function [char_bits] = Extract_process_1(sub_stego)
%UNTITLED2 此处显示有关此函数的摘要
%   此处显示详细说明
char_bits='';
[r,c]=size(sub_stego);
bin_sub_stego = myImageBitPlaneSlicing(sub_stego);%位平面分解，低位在前,高位在后
temp=xor(bin_sub_stego(1,1,2),bin_sub_stego(1,1,1));%ISB与LSB异或
bits=logical2str(xor(temp,bin_sub_stego(1,1,2)));%ISB与Temp异或
for i=1:r
    for j=1:c
        if i==1&&j==1
            j=2;%特殊处理一下
        else
        temp=xor(bin_sub_stego(i,j,2),bin_sub_stego(i,j,1));%ISB与LSB异或
        bits=[bits logical2str(xor(temp,bin_sub_stego(i,j,2)))];%ISB与Temp异或
        end
    end
end
for i=1:length(bits)
    char_bits=[char_bits char(bits(i))];
end
end

